Here is the full list of all 21 Ys II Chronicles+ achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Complete Ys II on Nightmare difficulty.
Master every achievement in Ys II.
Raise Tarf to max level.
Complete Ys II Time Attack.
Complete Ys II on any difficulty.
Sleep in three women's beds.
Unlock all details for all non-boss bestiary entries.
Slaughter ten generations of gatekeeper.
Completely fill the character notebook.
Ensure that Maria is not amused.
Max out your money.
Make all the animals in Ramia Village absolutely adore you.
Receive and eat four unique homemade food items.
Receive money from a duck.
Oh God make them go away!
Find and speak with Aldow.
Burn 50 villagers.
"Measure" Tarf.
Eliminate all the monsters in Gila's basement.
Scatter apples violently across the floor, most likely bruising them horribly.
Receive a free Short Sword.